Brake



' ,May l, 1923. l R. w.A PERKINS BRAKE Filed June 8, 1921 2 'sheets-sheet 1 May 1 R W, PERKINS BRAKE 2 Sheets-Sheet 2 Filed 'June 8, 1921 ROBERT W. PERKINS, F NORWICH, CONNECTICUT.

' BRE.

Application led June 8,

To all /wwm it may concer/n.;

Be it known that I, ROBERT W. PERKINS, a citizen of the United States of America, residing at Norwich, Connecticut, havey invented a new and useful Brake, of which the following is a specification.

My 'invention relates to mechanism for braking or retarding rotative movement of tatable.

ing

' being removed in order to better illustrate interior mechanism.

Fig. 2 is a sectional view on the plane of the line 2-2 of Figs. 1 and 3.

Fig. 3 is a side view of a complete device shown on a smaller scale. l

Figs. 4 and 5 are side views of details of' the mechanism.

Fig. 6 is a detail. y

Fig. 7 is a side view on a smaller scale showing a more orless diagrammatic view perspective view of another of a modication illustrating the principle of the invention.

-The two rings 10 and 11 in Fig. 7 are normally concentric and rotatable. Between these two rings is a compressible member 12, such for instance as a body of relatively resilient rubber. Within the inner ring is a non-rotatable disc orwring 13 and between the members 11 and 13 is an antifriction bearing 14 of lrollers or balls. When the rings. 10 and 11 are concentrically located, it is clear that they may rotate and may carry around with them the interposed resilient member 12, and the only resistance to rotation will be the friction of the bearing 14. If the inner member 13 and the bearing 14 are eccentrically dislaced with relation to the outer ring memer 10 as indicated by the full lines in Fig.

1921. serial no. 475,972.

7, the resilient material '12 will be compressed, which of course requires-the exercise of force. As the outer member rotates,

it will carry with it the resilient material into the contracted upper right hand space between the rings 10 and 11 so that the material 12 is being continually compressed and a braking ofect produced upon the rotatable member 10.

In the form of construction shown inthe v other figures of the drawing, the resilient member 12 is replaced by a series of spring shoes 12 carried by the ring or housing 10 and rotatable therewith. These may be backed up with other springs such as '12. rI`hese spring devices press toward the ring 11. Between the ring 11 and the member 13 is interposed an anti-friction bearingQ consisting of the bearing rings 11 and 13 and the balls orl rollers 14. Member 13 is supported by a member 15 which is secured to the stationary part 16. One method of support isl to provide the member 15 with -a recess 17 in which the knuckle 18 rests.

An' anti-friction bearing 19 is interposed between the member 15 and the hub 20 of the housing 10 so as to keep the member 15 in position with a relatively small amount of friction. The stud 21 has a cam 23 which coacts with the bearing surface 24. This stud 21 may be pivoted in a member 15 which is like member 15. The outer end ot .the stud 21 may be provided with an arm 25 suitable for rocking the same and throwing the cam 23 againstthe bearing 24. When the cam is oscillated or rocked about the axis of the stud 21, it displaces the inner ring 13 which turns on the knuckle 18 and thus displaces the ring 11 with relation to the ring 10 and compresses one or more of the spring devices which vhappen to be lin the general line of the direction of displacement. In order for the outer ring 10 to continue to rotate, it must interpose the next compressible spring device so that one or more of the spring devices are successively compressed. This consumes energy and produces thel braking effect desired. In the 'particular form.` shown, I have illustrated a duplicate set of displaceable inner mem- -bers as shown in' Fig. 2, one of which is adapted to be operated by movement of the arm 25 and the other by movement of the arm 25 shown in Fig. 3. The stud 21 pivoted in the ear 22 of the member -15 has a cam 23 to engage a ring 13a which is like the moving body that when required they oter substantially continuous oppositionto motion so that the rotating wheel or pulley can only continue its rotation by successive compression o1' deflection of a series -of springs. V rlhe braking e'ect is equal to the power required tocompress the springs and this may be increased br decreased by chang-l ing the osition of the dellecting member.- It should) be understood that I consider that any form of spring may be used within the broad scope of my invention. lt should be understood that l consider that' the invention may be embodied in other forms than those herein illustrated and that the terms of the claims are notte be construed as limitations except so far as required bythe stat/e of the art.

lTo operate the brake power is applied through the usual foot pedal or emergency lever (not shown) to move lever 25 or 25. lf lever 25 is moved to the right (Fi 3) the cam 23 will turn counter clockwise Fig l) and engaging bearing 24 swing the ring 13 to the right. rlhis displaces the bearing rings 13 and 11 and the ring 11 and compresses the springs at the right which of course are t' being carried around with the outer housing ring member. l0' on the main shaft. As it requires power to rotate new s rings intothe contracted space between rlngs lland 10 thering 10 or brake housing is retarded.

I claim:

1. In a device of the character described.,

two concentrically mountedV members one within the other and one of which is composed ot inner and outer rings with a series of springs between the rings and means for displacingv one of said members eccentrically of the other to compress the springs at one side. 2. ln a device of the character described, ahousing having a hub and a rim, a support on saidhub,4 an inner bearing ring mounted to swing on said support, an outer bearing ring rotatable about the inner ring, and a series 'of springs mounted between said housing and said outer bearing ring.

3. ln a device of the character described, a housing/having a hub, a support, an antif friction bearingbetween hub and support,

, ingI and said', housing.

raeaeoo a support, an eccentiically displaceable bearing ring carried by said support, an eccentric cam carriedl by said support tor displacing said ring, a rotatable member d resilient mechanism interposed between said ring and said member.

5. In a brake mechanism, `an outer rotatable member, an inner su port, 'a bear member pivoted to swing thereon and antfriction means and compression means interposed between said outer memberandsaid' bearing member.

6. In a brake mechanism," a rotatabl l housing, ls ring means carried thereby, an

eccentrical y displaceable member plvd 2"'2 to swing within said housin and an antifriction device between sai spring, means and said displaceable member..l

7 In' a brake mechanisme-rotatable hous. ing having a hub, -a support, anti-friction means'between said support and said hub, f

a ring carried by said'support andv adapted to be' eccentr'ically displaced with relation' to said hub, and resilient members interposed between said ring and said s 8.. lin a brake mechanism, a housinging a hub, a support mounted thereon, a

mounted to swing on said support, an antifriction bearing carried by said ring and resi-lient means mounted between said bear- 9. Brake mechanismeomprising a rotatable member, a series of springs carried thereby', ,al rotatable an antitriction bearing for said ring, an i meansfor laterallot` ly displacing said ring to cause it Vto succee- .v sivelycompress said springs as said rotaty able member rotates.

10. In a device of the character "e1-.

. u 7 two normally concentric annular meers with bearing balls between them, one of said members being pivoted eccentrically of4 the other member, and the other member being composed of outer and inner rings-with a' series of springs between them.- l

1l. ln a device of the character described, two ball bearing rings, ballsbetween them, a swlnging support 4torone ring, a rotatable companion member for the other ring and a series of springs connected between said rotatable member and its companion ring.

12. .In a device of the character described, i

two ball bearing rings, balls between' them, a support for' one ring., means for eccentricallyV displacing said support and said ring, a rotatable companion member for the other ring and a series of'springs connected between said rotatable member and its com- 'panion ring.

13. ln a device of the characterdescribed,

1,453,600 I l :i

two normally concentric rings, springs ina support having a recess at one edge, a terposed between said rings, a ball bean' ,bearing ring having a knuckle Aseated in v ing support for oneof said rings and pivsaid recess, a cam for engagngthe opposite 10 oted means for swinging one ring with lreside of said ring to displace the sameya r0- 5 specil to the otherfto displace the same eccentatable member and a series of springs intrically and compress said. springs. terposed between said member and said ring. 14. In a device of the character described, i ROBERT W. PERKl/NS. 

